node cluster test project
NODE_DEBUG=cluster node server.js
node server.js
worker id: 2 << when worker created
worker id: 3
worker id: 1
worker id: 4
worker id: 8
worker id: 6
worker id: 5
worker id: 7
worker 12796 died << worker has killed
worker 13120 died
worker 4080 died
worker 6200 died
worker 12728 died